Vue.js Use method in v-for

Question

I want to run a method inside a v-for in my Vue component. Example:

<div v-for="(foo,index) in bar">
      <p>{{myMethod(foo,index)}}</p>
</div>

When I do this the p-tag just stays empty. Here is my method(with an axios call):

 myMethod:function(foo,index) {
    axios.get('/myAjaxCall')
    .then((response)=> {
        //works perfectly
        alert(response.data);
        return response.data;

    })
    .catch(function (error) {
        console.error(error);
    });
   },
 }

When I alert( SomethingWithFooAndIndex), the browser is showing exactly what I need. When I remove the axios call the method seems to work

Thanks!

Answer 1

I dont think you should use myMethod in v-for

axios is asynchronous

Try to do myMethod with bar in another method, get a data newbar, you can render the newbar

<div v-for="(foo, index) in dataBar"> <p>{{otherSimpleMethod(foo, index)}}</p> </div>

1. add dataBar in data
2. do myMethod with variable bar in another method newMethod
3. update dataBar（the axios response） in newMethod
4. do newMethod in mounted(I guess you want to do this after page loaded)

Or you can try nextTick

BTW, the title Vue.js Use mounted in v-for ??? maybe Vue.js Use method in v-for???